Heathrow has mooted the idea of a congestion charge for passengers travelling to the airport if a third runway is approved.
The Airports Commission concluded in December there was need for an additional runway to be operational in the South East by 2030. It shortlisted three options for this - a second landing strip at Gatwick; and two proposals for a third runway at Heathrow.
Now Heathrow is expected to tell the Commission there may be a case for introducing a congestion charge to keep traffic levels under control with a bigger airport.
Heathrow head of surface access Simon Earles said: “During our recent community consultation, people raised concerns about the impact of a new runway on traffic congestion and air pollution.
“Once improvements to public transport to the airport have been delivered we believe there may be a case for a congestion charge for passengers travelling to the airport to reduce congestion, improve air quality, and raise money for further public transport improvements.
“The idea is at an early stage and we will of course consult on these plans at the appropriate time.”
Heathrow hopes more passengers will use Crossrail, High Speed 2 and an upgraded Piccadilly line to access the airport in the future.